Strip seal metal container



April 21, 1936 A w PUNTE 2,037,920

' STRIP SEAL METAL CONTAINER Filed May 25, 1952 Zhwentor OttornegPatented Apr. 21,1 1935 UNITED STATES PATENT OFFICE srrur SEAL 2:1 1?CONTAINER I William F. Punte,

Syracuse, N. 'Y., assignor to Inc., New York,

N. Y., a corporation of New York Application May 23, 1932, Serial No.613,094

2 Claims.

The invention relates to new and useful improvements in metalcontainers, and more particularly to a metal container wherein the coveris secured to the container body by a sealing strip.

An object of the invention is to provide a metal container having a bodyportion provided with a retaining shoulder and a cover which overliesthe body portion engaging an elastic gasket interposed between the coverand the container body, with a sealing strip which underlies saidshoulder and overlies the cover, and which securely clamps the cover tothe container.

A further object of the invention is to provide a container'of the abovetype wherein the cover has an outside slip engagement with the containerbody and is'provided with an upwardly projecting portion forming arecess for the sealing gasket so that said sealing gasket may extend Ibeyond the side wall of the container body.

\ a holding shoulder spaced from and adjacent In the drawing-' Figure lis a view partly in side elevation and partly in section showing a metalcontainer embodyingthe improvements;

Fig. 2 is a plan view of a portion of the same; Fig. 3 is an enlargedvertical section through a'container and sealing assembled and prior tothe subjecting of the sealing strip to pressure for sealing-thecontainer, and Fig. 4 is a view similar to Fig. 3, but showing thesealing strip after pressure has been applied for the closing of thecontainer.

The invention is directed to a metal container having a cover providedwith a depending flange which slips down over the container body makingengagement therewith so that said cover provides a closing means for thecontainer after the sealing strip has been removed. The body wall of thecontainer has an annular depression forming the upper edge of the bodywall. Said body wall terminates in an inturned hollow bead. The coverflange is bent outwardly at the upper portion of the flange and thecover disk is likewise curved upwardly directlyabove the bead on thecontainer body, so as to provide a recess or channel for the sealingmaterial. The flange terminates adjacent but above the holding shoulderon the container body, and is bent outwardly and inwardly to form a.half bead, the inner face of which is in line with the inner face of theflange. The sealing strip has its ends overlapping. Said sealing striphas an inwardly extending portion which underlies the shoulder on thecontainer. It also has an inwardly projecting portion which overlies thecover. The upper face of the cover is strip showing the parts curvedoutwardly, and the inwardly projecting portion of the sealing strip isalso curved initially about a shorter radius, but so that the inner edgethereof extends well over the curved portion on the cover. After thesealingstrip has been applied to the container, and the ends of thesealing strip joined, it is then subjected to die pressure in adirection lengthwise of the container wall, which shortens the-distancebetween the inwardly projecting portions of the sealing strip, causingthe upper portion thereof to curl inwardly and downwardly into contactwith the cover. This pressure applied to the sealing strip also forcesthe cover into tight sealing contact with the. container body, and thesealing strip. Whenreleased, holds. the cover in sealed engagement withthe container.

body.

Referring" more in detailto the drawing, the container consists of abody portion l which is preferably cylindrica. A closing bottom end 2 issecured to the container body by double-seaming. Said container body isprovided ,at the upper end thereof with .an .inturned hollow bead 3. Ata distance below this hollow bead is an annular depression 4 providing asubstantially horizontal holding shoulder 5. This annular depression ornecking-in of the ,body produces a container wherein both ends are ofsubstantially the same diameter, and at the same time the lockingshoulder for the retaining ring is provided in the wall of thecontainer. The container is closed by a cover 8 which is in the formof adisk extending across the open end of the container, and a dependingflange 1. This flange extends down over the body wall of the container,engaging the same so as to be held thereon by a light frictional grip.This provides a cover which may be used for re-closing the containerafter the sealing strip is removed. The cover flange is bent outwardlyat 8 and the cover disk is curved upwardly at 9 in order to form achannel for the sealingrnaterial which is in the form of a sealing ringit). While a sealing ring is shown, which is pre-formed, the sealingmaterial -may be placed on the cover, or a sealing disk extending allthe way across the cover may be used. The lower edge of the flangeterminates adjacent but above the holding shoulder 5. Said flange isbent outwardly, thence downwardly and inwardly to form a half bead l l,the inner face of which is substantially in line with the inner face ofthe flange. This bead at the lower end of the flange of the cover servesto place the sharp edge of the cover flange adjacent the body andprevents any danger of cutting the hands when removing the sealingstrip.It also forms a substantial support for the sealing strip to restagainst when it is pressed into position and maintains the wall of thesealing strip substantially parallel with the upper section of the bodywall.

The cover is secured to the container body by a sealing strip which isindicated at It in the drawing. Said strip has overlapping ends, one ofwhich is indicated at ii. The upper portion of the sealing strip is bentinwardly at II and overlies the cover. This inwardly bent portion iscurved upwardly and downwardly and initially about a smaller radius thanthe curved portion I of. the cover. It contacts with the curved portionof the cover when applied thereto well beyond the crown of the curvedportion I. The sealing strip I2 is also provided with an inwardlyprojecting portion I! atits lower edge which is initially slightlyinclined upwardly. This inwardly projecting portion l2- extendsunderneath the shoulder I when the seating strip is applied to thecontainer.

In m, a of the drawing, the sealing strip is shown as having beenapplied to the container after the parts are assembled. It is thensubjected to die pressure. One of the dies extends beneath the inturnedportion 12', while the other overlies the inturned portion ll of thesealing strip. The dies when moved toward each otherengage the sealingstrip and shorten the sealing strip between the inturned portions I! andI4 thereof. The dies starting at the inturned portion l2" and continueto curl the portion ll whichv results in a shortening of the distancebetween the inturned portions. This die pressure also forces'the coverinto very tight sealing contact with the gasket It, and the gasket intocontact with the hollow bead 3. Thus it is that a very tight seal isproduced, and the sealing strip. when the die pressure is released,retains the cover in this tight sealed engagement with the: containerbody.

The method of closing the container which includes the: steps ofde-forming the sealing strip bydiepressurewhich isexerted inadirectionlengthwise of the container wall while the sealing strip is restrainedagainst any bulging or detaching movement is described more in detailand claimed in my co-pending application Serial No. 11,852, flied. March19, 1985. When it is desired to open the. container and break the seal,the end I of the strip is forcibly pulled outwardly'and this willdisconnect the sealing strip from the container. The cover can then, bere moved and replaced for re-closing the container It 111. k

The can. body is made in cylindrical form, after which the outer edge isrolled to iorm a bead. 'lhis rolling of the edge produces a severestrain on the lapped portions of the body atthe side seam, andsometimescauses the bond to be broken. The fracture does not extend faralong theside seam, and by the present construction of cover and sealingband, the sealing material extends well over on to the outer face of thebead and the body wall so as toinsure a perfect seal.

It is obvious that minor changes in the details of construction of themetal parts and in the manner of applying the pressure for deforming thesealing strip and sealing the container may be made without departingfrom the spirit of the invention as set forth in the appended claims.

Having thus described the invention, what I claim as new and desire tosecure by Letters Patent, is-

l. A metal container comprising a body portion having an annulardepression in the wall thereof adjacent the upper end forming a holdingshoulder, said body wall being rolled inwardly at its upper edge to forma hollow bead, said shoulder being disposed beneath said hollow bead, acover havinga depending flange extending over and engaging the outerface of the wall of the container, said flange terminating adjacent andabove said shoulder and being bent outwardly and inwardly to form a halfhead at the lower edge of said flange, said cover flange being bentoutwardly at the upper portion there- 01 and adjacent the hollow bead,said outwardly bent portion being of substantially the same diameter asthe diameter of the halfbead at the lower edge of the flange, said coverhaving an annular portion above the hollow bead which is curvedupwardly, a sealing member located within the cover and extending acrossthe annular portion and into the recess formed in the cover flange, anda sealing strip having inwardly projecting portions, one of whichunderlies the shoulder on the container body and the other of whichoverlies the upwardly curved portion of the cover directly above thehollow bead, whereby said sealing strip may be utilized for forcing thecover against the sealing material and the sealing material against thehollow bead on the container body by direct pressure lengthwise ofthewall of the container.

2. A metal container comprising a body portion having an annulardepression in the wall thereof adjacent the upper end forming ashoulder, said body wall being rolled inwardly at its upper edge to forma hollow bead, said shoulder being displaced beneath the bead, a coverhaving a depending flange extending over and enl sin 'the outer face ofthe wall of the container, said flanges terminating adjacent and abovethe shoulder and being bent outwardly andinwardlytoformahalfbeadattheloweredge of said flange, said cover flangebeing bent outwardly at theupper portion thereof and of sub- .stantiallythe same diameter as the diameter of the half head at the lower edge ofthe flange, said cover having an annular portion above the hollow headwhich is curved upwardly, a sealing member located within the cover andover said hollow bead, and a metal sealing strip having inwardlyprojecting portions, one of which underlies the shoulder of thecontainer body and the other of which overlies the upwardly curvedportion of the cover directly above the hollow bead whereby said sealingstrip may be utilized for forcing the cover against the sealing materialand the sealing material against the hollow bead on the container bodyby direct pressure lengthwise of the wall of the container and againstthe upper and lower faces of the metal sealing strip.

WILLIAMEPUN'I'E.

